ALORAIR Sentinel HS35 Review: A Compact 70-Pint Crawl Space Unit
ALORAIR's Sentinel HS35 is a compact 70-pint crawl space unit with manual knobs and a 6.5 ft drain hose.
By Daniel Brooks
Updated October 28, 2026
The ALORAIR Sentinel HS35 Dehumidifier is ALORAIR’s compact crawl space dehumidifier, rated at 35 PPD under AHAM conditions and up to 70 pints at saturation for spaces up to 1,000 sq ft. For more models, see our Whole-House & Crawl Space Dehumidifiers page.
Our Verdict
For a smaller sealed crawl space, the HS35 is simple, reliable and backed by ALORAIR’s 6-year limited warranty.
It has manual knobs rather than a digital display and no pump.
ALORAIR Sentinel HS35 Dehumidifier
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | ALORAIR |
| Model | Sentinel HS35 |
| Capacity | 70 pints at saturation, 35 PPD at AHAM |
| Coverage | Up to 1,000 sq ft |
| Airflow | 115 CFM |
| Drainage | 6.5 ft gravity hose |
| Controls | Manual knobs |
| Size and Weight | 15.35 x 11.2 x 11.4 inches, 37.8 pounds |
Design
At 15.35 x 11.2 x 11.4 inches and 37.8 pounds, it slides through small access doors. An ergonomic handle makes it easy to position.
The 6.5 ft drain hose provides continuous gravity drainage.
Controls
Manual knobs set humidity, with nothing to reprogram after an outage.
Airflow is 115 CFM, and auto defrost keeps it running in cool conditions.
Placement Tips
In a crawl space, set the unit level on a vapor barrier, blocks or a hanger kit, away from standing water, with clear space around the intake and outlet. Run the drain hose with a steady downhill slope, or route the pump line to a sink, sump or exterior opening.
Seal vents and lay a vapor barrier first. A dehumidifier in a vented crawl space spends its effort drying outdoor air.
Running Costs and Care
Check the filter every month or two during heavy use and rinse or replace it when dirty. Make sure the drain line stays clear and, on pump models, test the pump occasionally.
Set the humidity target around 50% to 55%. The compressor then cycles off once the space is dry, which keeps running costs down.
How It Compares
Against the HD55S, the HS35 has about two thirds the AHAM capacity but costs less and is smaller.
Against look-alike 70-pint units from other brands, the ALORAIR wins on warranty and support.
Pros and Cons
| Pros | Cons |
|---|---|
| Compact | No pump |
| Simple manual controls | No digital display |
| 115 CFM airflow | Smaller coverage |
| Auto defrost | Needs a drain below it |
| 6-year limited warranty | Basic filter |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Small crawl spaces | Large crawl spaces |
| Encapsulated crawl spaces | Spaces with no drain |
| Storage areas | Wet, vented spaces |
| First-time buyers | Anyone wanting app control |
For more options, see our picks for the best 70-pint crawl space dehumidifiers and the best crawl space dehumidifiers under 400.
Final Verdict
The ALORAIR Sentinel HS35 Dehumidifier is a small, dependable crawl space dehumidifier. You can check the current price and details for the ALORAIR Sentinel HS35 Dehumidifier.
Frequently Asked Questions
What is its AHAM rating?
35 PPD.
What area does it cover?
Up to 1,000 sq ft.
How long is the drain hose?
6.5 ft.
Does it have a pump?
No.
How heavy is it?
37.8 pounds.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.